Studies of the structure and chemistry of SBA-15 organosilicas functionalized with amine, thiol, vinyl and phenyl groups

SBA-15 organosilicas containing amine, thiol, vinyl and phenyl pendant groups were synthesized by co-condensation of tetraethoxysilane and appropriate alkoxysilanes in the presence of Pluronic P123 surfactant. The obtained materials have usually well-developed porous structure-values of specific surface area are in the range 820-950 m(2)/g. Sizes of the ordered mesopores are in the range 7.5-9.1 nm while the interconnecting pores are 2.3-3.1 nm in size. It was establish that size of the mesopores strongly depends even on small amounts of co-monomers co-condensing with tetraethoxysilane. Several instrumental techniques such as infrared spectroscopy, X-ray diffraction, nitrogen sorption measurements, elemental analysis, transmission electron microscopy. FT-IR photoacoustic spectroscopy (FT-IR/PAS) was used to determine chemical composition of the final materials and to monitor the efficiency of the template removal.